什么是裹(guo)背條(tiao)，裹(guo)背條(tiao)是通過皮殼(ke)機等(deng)機械用于(yu)精裝書(shu)(shu)(shu)(shu)本(ben)(ben)的(de)書(shu)(shu)(shu)(shu)脊部分，使(shi)書(shu)(shu)(shu)(shu)貼連接(jie)得更加牢(lao)固。書(shu)(shu)(shu)(shu)脊制作(zuo)弧長的(de)計算，本(ben)(ben)器規(gui)格(ge)依(yi)書(shu)(shu)(shu)(shu)芯幅面大小(xiao)進行調定(ding)，以(yi)能將書(shu)(shu)(shu)(shu)芯平(ping)穩地(di)送進夾書(shu)(shu)(shu)(shu)裝置(zhi)(zhi)內(nei)為(wei)標準。入(ru)本(ben)(ben)后(hou)的(de)書(shu)(shu)(shu)(shu)冊不斜歪，四角垂直(zhi)地(di)頂齊在夾書(shu)(shu)(shu)(shu)裝置(zhi)(zhi)的(de)靠板、側規(gui)內(nei)。裁(cai)切(qie)尺寸正確一(yi)致(zhi)，其(qi)質量要求與規(gui)格(ge)誤(wu)差與一(yi)般(ban)切(qie)書(shu)(shu)(shu)(shu)相同。

夾(jia)書(shu)簽(qian)絲帶(dai)裝置安(an)放在切(qie)書(shu)機(ji)與扒圓(yuan)起脊機(ji)之(zhi)間(jian)。即將(jiang)切(qie)完的書(shu)芯(xin)，用分(fen)本(ben)器(qi)從中間(jian)分(fen)開，再由輸放絲帶(dai)器(qi)將(jiang)絲帶(dai)夾(jia)入中心(xin)紙(zhi)書(shu)芯(xin)的中間(jian)靠(kao)訂縫(feng)一邊。絲帶(dai)夾(jia)在書(shu)芯(xin)內(nei)兩端各留出粘(zhan)邊和使(shi)用的余地，再經(jing)切(qie)刀(dao)（剪(jian)刀(dao)式(shi)）將(jiang)其剪(jian)斷。

剪斷后的(de)絲(si)帶，裹背(bei)(bei)(bei)條(tiao)(tiao)芯(xin)(xin)部分被下(xia)面膠輥著膠、壓實完成夾(jia)書(shu)(shu)(shu)(shu)(shu)(shu)簽絲(si)帶過程。書(shu)(shu)(shu)(shu)(shu)(shu)簽絲(si)帶的(de)長(chang)度(du)(du)與一(yi)般手工(gong)加(jia)工(gong)長(chang)度(du)(du)基本相(xiang)(xiang)同(tong)，可依書(shu)(shu)(shu)(shu)(shu)(shu)冊幅面長(chang)度(du)(du)調定。扒圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)操作及(ji)要求(qiu)。書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)經(jing)裁切、夾(jia)粘絲(si)帶（或(huo)不夾(jia)粘絲(si)帶）后，繼續傳送（或(huo)翻轉(zhuan)變(bian)位(wei)）并做90°翻轉(zhuan)，使平(ping)(ping)放書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)變(bian)為(wei)后背(bei)(bei)(bei)朝上（或(huo)朝下(xia)）而(er)進入扒圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)機。扒圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)機的(de)加(jia)工(gong)，其操作分為(wei)兩步，但(dan)機器的(de)結構(gou)是連在一(yi)起(qi)的(de)，均是先(xian)扒圓(yuan)(yuan)(yuan)后起(qi)脊(ji)(ji)(ji)(ji)。扒圓(yuan)(yuan)(yuan)。扒圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)機在扒圓(yuan)(yuan)(yuan)時，由一(yi)組(zu)（或(huo)一(yi)對）圓(yuan)(yuan)(yuan)輥，將書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)壓緊后作相(xiang)(xiang)對旋轉(zhuan)動作），使書(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)扒成適當規(gui)格圓(yuan)(yuan)(yuan)勢，加(jia)工(gong)成圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)書(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)的(de)形狀分為(wei)圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)有脊(ji)(ji)(ji)(ji)、圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)無脊(ji)(ji)(ji)(ji)和(he)方背(bei)(bei)(bei)（或(huo)稱(cheng)平(ping)(ping)背(bei)(bei)(bei)）三種(zhong)。平(ping)(ping)裝(zhuang)裹背(bei)(bei)(bei)條(tiao)(tiao)書(shu)(shu)(shu)(shu)(shu)(shu)刊的(de)書(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)不高(gao)出(chu)書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)平(ping)(ping)面，而(er)精裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)刊的(de)書(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)一(yi)般要高(gao)出(chu)書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)的(de)平(ping)(ping)面。書(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)分為(wei)真(zhen)脊(ji)(ji)(ji)(ji)和(he)假脊(ji)(ji)(ji)(ji)。

真脊(ji)(ji)(ji)是利(li)(li)用書(shu)背上下兩(liang)邊變(bian)形(xing)的(de)(de)(de)弧度(du)高出(chu)書(shu)芯平(ping)面(mian)；假(jia)脊(ji)(ji)(ji)則(ze)是利(li)(li)用紙板(ban)鑲在(zai)書(shu)背后形(xing)成的(de)(de)(de)書(shu)脊(ji)(ji)(ji)，書(shu)脊(ji)(ji)(ji)的(de)(de)(de)脊(ji)(ji)(ji)高等于封面(mian)紙板(ban)的(de)(de)(de)厚(hou)度(du)。方(fang)背書(shu)芯。是指書(shu)芯的(de)(de)(de)書(shu)背平(ping)直方(fang)正(zheng)。書(shu)背不突(tu)出(chu)，與平(ping)裝書(shu)刊(kan)的(de)(de)(de)書(shu)背基(ji)本相似。

背(bei)(bei)(bei)(bei)(bei)(bei)與(yu)(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)上下環(huan)襯(chen)互成直角，由于精裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)是用(yong)鎖線訂訂連，每一(yi)個書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖的(de)訂口折縫里(li)面都用(yong)線串過(guo)，因(yin)此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)背(bei)(bei)(bei)(bei)(bei)(bei)脊(ji)比(bi)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖其它(ta)部(bu)(bu)分要厚(hou)(hou)一(yi)些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)的(de)帖數越多(duo)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)背(bei)(bei)(bei)(bei)(bei)(bei)與(yu)(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)其它(ta)部(bu)(bu)分厚(hou)(hou)度的(de)差別也越大。所以方背(bei)(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)的(de)形(xing)式一(yi)般只用(yong)于厚(hou)(hou)度約為20mm的(de)精裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)。圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)有(you)(you)(you)(you)(you)脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)。圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)有(you)(you)(you)(you)(you)脊(ji)又(you)稱圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)真脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)背(bei)(bei)(bei)(bei)(bei)(bei)部(bu)(bu)呈圓(yuan)(yuan)(yuan)(yuan)弧(hu)形(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)高(gao)起(qi)有(you)(you)(you)(you)(you)脊(ji)壟，堅(jian)硬(ying)挺(ting)實，這(zhe)種(zhong)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)(bei)的(de)形(xing)式適合于裝(zhuang)訂較厚(hou)(hou)的(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)，裝(zhuang)上書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼后有(you)(you)(you)(you)(you)明顯(xian)的(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻(fan)閱方便。目前我國的(de)精裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)多(duo)采(cai)用(yong)這(zhe)種(zhong)圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)有(you)(you)(you)(you)(you)脊(ji)的(de)加工形(xing)式。圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)無脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)。圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)無脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)又(you)稱圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)假(jia)脊(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)背(bei)(bei)(bei)(bei)(bei)(bei)部(bu)(bu)呈圓(yuan)(yuan)(yuan)(yuan)弧(hu)形(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)(bei)與(yu)(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)的(de)厚(hou)(hou)度相同，堅(jian)實挺(ting)括，但(dan)沒有(you)(you)(you)(you)(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)(bei)(bei)(bei)條脊(ji)。這(zhe)種(zhong)形(xing)式的(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)，一(yi)般常與(yu)(yu)軟質(zhi)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼或塑料壓制而成的(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼相配套。中(zhong)心紙有(you)(you)(you)(you)(you)些機器(qi)還沒有(you)(you)(you)(you)(you)沖圓(yuan)(yuan)(yuan)(yuan)裝(zhuang)置(zhi)，即將方背(bei)(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先進(jin)行(xing)沖圓(yuan)(yuan)(yuan)(yuan)加工，作初(chu)步定(ding)型。先根據(ju)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)厚(hou)(hou)度和(he)中(zhong)心紙幅面大小調定(ding)好夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)及(ji)扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)輥(gun)（或沖圓(yuan)(yuan)(yuan)(yuan)裝(zhuang)置(zhi)）的(de)規矩(ju)，再使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)進(jin)入夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)內(nei)并送到扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)輥(gun)之間，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)(bei)扒(ba)(ba)擠成一(yi)定(ding)圓(yuan)(yuan)(yuan)(yuan)勢。